Mitsubishi Electric MSZ-JP09WA Service Manual Download Page 20 | Manualshive

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20

9-5. TROUBLE CRITERION OF MAIN PARTS

MSZ-JP09WA MSZ-JP12WA

Part name

Check method and criterion

Figure

Room temperature

thermistor (RT11)

Indoor coil thermistor

(RT12, RT13)

Measure the resistance with a tester.

Refer to 9-7. "Test point diagram and voltage", 1 or 2. "Indoor electronic

control P.C. board", for the chart of thermistor.

Indoor fan motor (MF)

Check 9-6.

Horizontal vane motor (MV)

Measure the resistance between the terminals with a tester.

(Part temperature 50 - 86°F (10 - 30°C))

Color of the lead wire

Normal

RED-BLK

223 - 268

Ω

BLK

BLK
RED

BLK

BLK

ROTOR

ROTOR

OBH820

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Summary of Contents for MSZ-JP09WA

Page 1: ...NDOOR UNIT Models MSZ JP09WA U1 MSZ JP12WA U1 CONTENTS 1 TECHNICAL CHANGES 2 2 PART NAMES AND FUNCTIONS 3 3 SPECIFICATION 4 4 OUTLINES AND DIMENSIONS 6 5 WIRING DIAGRAM 7 6 REFRIGERANT SYSTEM DIAGRAM 8 7 SERVICE FUNCTIONS 9 8 MICROPROCESSOR CONTROL 11 9 TROUBLESHOOTING 15 10 DISASSEMBLY INSTRUCTIONS 27 No OBH820 ...

Page 2: ...Doing so may cause a burst an explosion or fire when the unit is being used serviced or disposed of Correct refrigerant is specified in the manuals and on the spec labels provided with our products We will not be held responsible for mechanical failure system malfunction unit breakdown or accidents caused by failure to follow the instructions OBH820 ...

Page 3: ...changer Front panel Air cleaning lter Anti Allergy Enzyme Filter option Display section Remote controller ACCESSORIES Installation plate 1 Attachment screws for the installation plate 4 25 mm 5 Battery AAA for remote controller 2 Wireless remote controller 1 Felt tape For left or left rear piping 1 Remote controller holder 1 Screws for the remote controller holder 3 5 16 mm Black 2 OBH820 ...

Page 4: ...ry CFM 406 321 237 170 Moisture removal pt h 1 5 2 5 Sound level Super High High Med Low Cooling dB A 43 37 30 22 45 37 30 22 Heating dB A 43 37 30 22 Fan speed Super High High Med Low Cooling rpm 1 020 860 670 530 Heating rpm 1 040 860 670 530 Cond drain connection O D in 5 8 Dimensions W in 31 7 16 D 9 1 8 H 11 5 8 Weight Ib 22 External finish Munsell 1 0Y 9 2 0 2 Control voltage by built in tra...

Page 5: ...phase 60 Hz Min 103 115 Max 127 3 2 OUTLET AIR SPEED AND COVERAGE The air coverage is the figure up to the position where the air speed is 1 ft s when air is blown out horizontally from the unit properly at the High speed posi tion The coverage should be used only as a general guideline since it varies accord ing to the size of the room and furniture arranged inside the room Model Mode Function Ai...

Page 6: ...A 4 OUTLINES AND DIMENSIONS 11 16 5 1 2 2 1 4 Piping Insulation ø1 3 8 O D Liquid line ø1 4 19 11 16 Flared connection ø1 4 Gas line ø3 8 16 15 16 Flared connection ø3 8 Drain hose Insulation ø1 1 8 O D Connected part ø5 8 O D OBH820 ...

Page 7: ...7 5 WIRING DIAGRAM MSZ JP09WA MSZ JP12WA OBH820 ...

Page 8: ...temperature thermistor RT11 Flared connection Refrigerant pipe ø3 8 ø9 52 with heat insulator Refrigerant pipe ø1 4 ø6 35 with heat insulator Indoor coil thermistor RT12 main Indoor coil thermistor RT13 sub Refrigerant flow in cooling Refrigerant flow in heating MSZ JP09WA MSZ JP12WA OBH820 ...

Page 9: ...emote controller P C board has the print J1 and J2 Solder J1 and J2 according to the number of indoor unit as shown in Table 1 After modification press the RESET button NOTE For modification take out the batteries and press the STOP OPERATE OFF ON button 2 or 3 times at first After finish modification put back the batteries then press the RESET button Table 1 1 unit operation 2 units operation 3 u...

Page 10: ...t Therefore the special counter measures are required to prevent the main voltage drop or the rush of the starting current by adding to the system that allows the units to start one by one 7 3 AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller the operation mode the set temperature and the fan speed are memorized by the indoor electronic control P C board AUTO REST...

Page 11: ...g to reach the set temperature About 4 F 2 C or more away from set temperature The room temperature is approaching the set tem perature About 2 to 4 F 1 to 2 C from set temperature Lit Blinking Not lit 8 1 COOL OPERATION 1 Press STOP OPERATE OFF ON button OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone 2 Select COOL mode with OPERATION SELECT button 3 Press TEMPERATURE button...

Page 12: ...ature of indoor heat exchanger becomes too high the high pressure protection works The indoor fan operates following the cold air prevention control This mode continues until the temperature of indoor heat exchanger falls 3 Defrosting Defrosting starts when the temperature of outdoor heat exchanger becomes too low The compressor stops once the indoor outdoor fans stop the 4 way valve reverses and ...

Page 13: ... vane swings in various cycle SWING operation makes you feel cooler than set temperature So even though the set temperature is higher the air conditioner can keep comfort As a result energy can be saved ECONO COOL operation is cancelled when ECONO COOL button is pressed once again or VANE CONTROL button is pressed or change to other operation mode 8 5 TIMER OPERATION ON OFF TIMER 1 How to set the ...

Page 14: ...or emergency operation the horizontal vane operates in VANE AUTO mode Emergency operation continues until EMERGENCY OPERATION switch is pressed once or twice or the unit receives any signal from the remote controller In the latter case normal operation will start NOTE Do not press EMERGENCY OPERATION switch during normal operation Operation mode COOL HEAT Set temperature 75 F 24 C 75 F 24 C Fan sp...

Page 15: ...ON and OFF before starting ser vice work 2 Before servicing check that the connector and terminal are connected properly 3 When the P C board seems to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 4 When troubleshooting refer to 9 2 9 3 and 9 4 4 How to replace batteries Weak batteries may cause the remote controller malfunction In t...

Page 16: ...normal point by referring to the indoor unit failure mode table Refer to 9 2 2 Make sure to check at least 2 consecutive blinking cycles 2 Releasing the failure mode recall function Release the failure mode recall function by the following procedures Turn OFF the power supply and turn it ON again Press RESET button of the remote controller The outdoor unit is abnormal Check the blinking pattern an...

Page 17: ...tics of the main indoor coil ther mistor the sub indoor coil thermistor 9 7 3 time blink 2 5 second OFF Serial signal The serial signal from outdoor unit is not re ceived for a maximum of 6 minutes Refer to 9 6 How to check miswiring and serial signal error 11 time blink 2 5 second OFF Indoor fan motor The rotational frequency feedback signal is not emitted for 12 seconds after the indoor fan moto...

Page 18: ...h ON and OFF at 0 5 second intervals Cause Indoor Outdoor unit Miswiring or trouble of se rial signal Upper lamp 2 time blink Cause Indoor unit Trouble of room temperature indoor coil thermistor Upper lamp 3 time blink Cause Indoor unit Trouble of indoor fan motor Upper lamp 4 time blink Cause Indoor unit Trouble of indoor unit control system Upper lamp 5 time blink Cause Outdoor unit Outdoor powe...

Page 19: ...nic control P C board Replace the indoor electronic control P C board 5 Outdoor power sys tem Upper lamp blinks 5 time blink 2 5 second OFF It consecutively occurs 3 times that the com pressor stops for overcurrent protection or start up failure protection within 1 minute after start up Refer to How to check of in verter compressor Refer to outdoor unit service manual Check the stop valve 6 Outdoo...

Page 20: ...e the resistance with a tester Refer to 9 7 Test point diagram and voltage 1 or 2 Indoor electronic control P C board for the chart of thermistor Indoor fan motor MF Check 9 6 Horizontal vane motor MV Measure the resistance between the terminals with a tester Part temperature 50 86 F 10 30 C Color of the lead wire Normal RED BLK 223 268 Ω BLK BLK RED BLK BLK ROTOR ROTOR OBH820 ...

Page 21: ... goes 0 V DC although the indoor P C board is normal Does the voltage between CN211 and on the power P C board rise to the range of 3 to 6 V DC within 12 seconds after EMERGENCY OPERATION switch is pressed Replace the indoor fan motor Yes No The indoor fan motor error has occurred and the indoor fan repeats 12 second ON and 30 second OFF 3 times and then stops Measure the voltage between CN211 and...

Page 22: ... type within the range of 3 28 ft 1m 2 Yes No Reinstall the unit away from lights Attach a filter on receiving part Replace the indoor electronic control P C board Including the receiver 1 Look at the image of the signal transmitting section of the remote controller through the monitor of a digital camera or a camera phone It is normal if the LED of the signal transmitting section lights up when t...

Page 23: ...door power P C board and the indoor fan motor and the indoor terminal P C board Replace the indoor electronic control P C board Measure the resistance of the vane motor coil Refer to 9 5 Short open circuit Replace the vane motor and the indoor electronic control P C board 1 The fan motor connector s lead wire is red whereas is black 2 Connect of the tester to fan motor connector s lead wire and to...

Page 24: ...second ON quick blinking 3 Yes No Lit or not lighted Replace the inverter P C board or the outdoor electronic control P C board 2 2 Be careful of the residual voltage of smoothing capacitor Is there amplitude of 10 to 20 V DC between indoor terminal block S2 and S3 Confirmation of serial signal Yes Check the wiring If there are any error of the indoor outdoor connecting wire such as the damage of ...

Page 25: ... strength or the installation condition combination of specific conditions such as antennas or wiring Check the followings before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout...

Page 26: ...r fan motor CN211 0 6 V 3 6 V DC 15 V DC GND high voltage DC 162 V DC Timer short mode point JPG JPS Refer to 7 1 Room tempera ture thermistor RT11 CN111 Indoor coil ther mistor RT12 RT13 CN112 Vane motor CN151 Connector to Indoor power P C board CN10A 12 V DC 5 V DC To disable Auto restart function solder the Jumper wire to JR07 Refer to 7 3 Emergency operation switch SW1 2 Indoor electronic cont...

Page 27: ...re is a locking lever or not 2 The terminal with this connector shown below has the locking mechanism Slide the sleeve Pull the terminal while pushing the locking lever Hold the sleeve and pull out the terminal slowly Connector Sleeve Locking lever Detaching method of the terminal with locking mechanism The terminal which has the locking mechanism can be detached as shown below There are 2 types o...

Page 28: ...r electronic control P C board Photo 2 Photo 3 Photo 4 3 Removing the indoor power P C board the indoor terminal P C board and the electrical box 1 Remove the panel Refer to section 1 and the corner box 2 Remove the indoor outdoor connecting wire and the indoor electric control P C board holder Refer to section 2 2 8 3 Remove the screw of the conduit cover and the con duit cover 4 Remove the screw...

Page 29: ...Pull out the drain hose from the nozzle assembly and remove the nozzle assembly Photo 5 5 Removing the horizontal vane motor 1 Remove the nozzle assembly Refer to section 4 2 Remove the screws of the horizontal vane motor unit 3 Disconnect the connector from the horizontal vane motor 4 Remove the screws of the horizontal vane motor 5 Remove the horizontal vane motor from the horizontal vane motor ...

Page 30: ...emove the indoor coil thermistor from the heat exchanger Install the indoor coil thermistor in its former position when assembling it See photo 9 9 Remove the screws fixing the left side of the heat exchanger 10 Lift the heat exchanger and pull out the line flow fan to the lower left When attaching the line flow fan screw the line flow fan so 5 32 inch 4 mm gap is provided between the right end of...

Page 31: ...ked position Do not pull the lead wire when removing the indoor coil thermistor Holder shape Clip shape When fixing the indoor coil thermistor to the clip shape holder shape part the lead wire should point down 1 Set the indoor coil thermistor in the center of the clip shape part 2 Check the marked mounting position 3 Mount the clip shape part Position and procedure for mounting the clip shape par...

Page 32: ...ICE TOKYO BUILIDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Published Nov 2018 No OBH820 Made in Japan Specifications are subject to change without notice ...

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